Heater connection



-0 Aff4 ATTOR u infn CHARLES H. IDESAUTELS, OF SPRNGFEFLJD, MASSACHUSETTS, ASSIGITOR T0 THE FISK RUBBER COMPANY, 0l CHJECOFEE FALLS, MASSACHUSETTS, A CORPORATON OF MASSACHUSETTS.

Application tiled June 30, 1922. Serial No. 571,934.

To all whom it may concern:

Be it known that l, CHARLns -l. :Unsati- TnLs, a citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful llrnproveinents in Heater Connections, oi which the following is a specification.

lvly present invention relates to connections especially adapted for use in connection with heaters in which cord tires are customarily vulcanized. lthas for its object the improvement in va 1ious particulars which will more fully appear below of theJ connections which supply air, water, -o'r steam to the inside of the tires to compress them against the vulcanizing molds, especially in regard to the qualities of reliabilityJ durability, and speed in operation. The in vention will now be described in reference to the accompanying drawings, in which Fig. l is a sectional view of a. heater witlL a stack of molds therein, illustrating the manner of attachment of my improved con nectors;

Fig. 2 is a detail of one of the connectors;

Fig. 3 is a sectional View of one end of the connectors;

Fig. l is an end View thereof;

Fig. 5 is a sectional view of the other end of the connector;

Fig. 6 is an end view thereof; and

Fig. 7 is a fragmentary view, partly in section, of one end of the connector, showing a modified construction.

The heater illustrated in Fig. l is of the usual type, having a casing 10 provided with a detachable cover il and a hydraulic rain 12, by which a stach of molds 13 can be forced against the cover and thus held closed` Inside the tire 14; in cach mold is an expansible bag l5 adapted to be connected to a suitable source of fluid under pressure whereby the tire will be si rctched out against the mold. Each bag has a suitable stem lo to which is joined a connector l? attached at its other end to a manifold 18, conveniently made sectional, and connected to a source of fluid under pressure by a pipe lf) having a flexible coil 2O to prevent breakage.

It is to the connection 17 that my invention particularly relates. it has been proposed to form this out of a coiled piece of exible copper tubing, but much diliiculty 'that the hose 22 is substanth has resulted from the tubing cracking where it is joined to the necessary union for coupling it to the bag. Furthermore this tul ing becomes bent and twisted out of position so that it is difficult to connect and liable to breakage. rfi-.coording to the preferred forni of the invention l employ a copper tube 2l surrounded by a ilenible metal hose 22 of standard construction. i/lccording1 to the modification illustrated in Fig. this hose is replaced by a spiral spring 23. Returning to the preferred forni of Figs. 3 and 5, the connection ispreferably cc, structed so y l l l nid tight, sothat Ythe tubing brealts the hose will prevent such rapid leakage of the fluid as would cause damage to the tires in the heater.

A convenient and preferred way of forming the end attachment is by brazing the tubing inside and the hose outside of the snanlt Q4 of a nipple 25 permanently connected at 26 to the manifold i8, and of a nipple 26 at the other end of the connector. A wing nut 2'4" has a flange 28 held by a flange on the head of this latter nipple, and is provided with internal threads 29 whereby it may be screwed upon the stem of the valve. flhe nipple has a. tapered head 30 so that as it is drawn towards the stem by the screwing up of the wing nut a tight connection will be made.

The hose has preferably a sntlicient natural springiness to cause it to tend to straighten, and is bent into a circle (Fig. 2) and its ends clipped by a ring 3l or an equivalent device, fitting loosely enough to permit slippage. By this constructihn a flexible connector is provided with the wing nut 2'? always in position to be connected to the stem of the bag, and the result is attained simply. This latter feature may be used without the double tube if desired.

Having thus described my invention, I claim:

A connector for use in cord tire heaters comprising manifold, an elastic flexible tube secured thereto, .aid tube being bent upon itself, and a ring through which each end of the tube passes, whereby the end of the tube not secured to the manifold is held constantly in convenient position for connection to the stein cfa tire vulcanizing bag.

CHARLES H. DESAUTELS. 

